A family uses a washing machine that consumes 45 liters of water per wash. They wash clothes 4 times a week. How many liters of water does the family use for washing clothes in 4 weeks?
Answer
720 liters
The correct answer is 720 liters — Multiply weekly usage by 4 weeks: 180 liters × 4 = 720 liters.
Step-by-step solution
- Determine water used per week: 45 liters × 4 washes = 180 liters.
- Multiply weekly usage by 4 weeks: 180 liters × 4 = 720 liters.
Common mistake: Not multiplying by 4 weeks
Concept tested: Weekly and monthly water usage calculation
Published · How this solution was prepared and checked
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